好的,所以我的计算机类的任务很简单(它应该显示遍历数组和东西)。我不得不创建一个带有数组的版本和一个带有arrayLists的版本,所以在tester类中我有一些静态方法,但是当我使用arrayList时,我尝试从该类的对象调用一个方法(它是一个getter方法) )我得到的是一条错误消息,表示无法找到它。
以下是我的代码的缩短版本:
import java.util。*; import java.util.List;
public class testCandidate2 {
public static int getTotal(ArrayList election)
{
int total = 0;
for(int b = 0; b <election.size(); b++)
total += election.getNumVotes();
return total;
}
public static void main(String[] args)
{
int totalVotes;
List <Candidate> election = new ArrayList<Candidate>(5);
election.add() = new Candidate(5000, "John Smith");
totalVotes = getTotal(election);
}
}
公共班候选人 {
private String name;
private int numVotes;
Candidate(int nv, String n)
{
name = n;
numVotes = nv;
}
public String getName()
{
return name;
}
public int getNumVotes()
{
return numVotes;
}
public String toString()
{
return name + " recieved " + numVotes + " votes.";
}
}
答案 0 :(得分:0)
试试这个:
import java.util.*;
//import java.util.List;
public class testCandidate2 {
public static int getTotal(ArrayList election)
{
int total = 0;
for(int b = 0; b <election.size(); b++)
{
Candidate ele = (Candidate) election.get(b);
// System.out.println(ele.getNumVotes());
total += ele.getNumVotes();
//System.out.println(o.getNumVotes());
}
//System.out.println( (Candidate) (election.get(b).getNumVotes());
//.getNumVotes();
return total;
}
public static void main(String[] args)
{
int totalVotes;
ArrayList <Candidate> election = new ArrayList<Candidate>(5);
election.add(new Candidate(5000, "John Smith"));
totalVotes = getTotal(election);
System.out.println(totalVotes);
}
}